editor-widget | Editor widget | Editor library

The widget uses a simple template at "templates/ckeditor/widget.html" (see the source). So create your own by that name in your app to override it (this requires your app appear before django-ckeditor in INSTALLED_APPS).

You are already overriding the submit handler, my recommendation is to find a better way to achieve what you need. if it's not possible, I can suggest three approaches to get it fixed:

1. After manipulating your form, do the submission logic manually from JavaScript

2. Or, use addEventListener and removeEventListener, to add a custom handler and remove it before re-triggering the event

Just try to import your fonts in simple template file, if it's working fine, the problem will be with your path aliases. (I mean for example with @web or in your case with @webroot)

Or you can use Application Assets, you can write your own and you can define all dependencies what you want to use for the application. Also there are some examples with aliases and you can try out what will be happen if you use them like there.